Create an account or log in to Instagram – Share what you’re into with the people who get you.
Get the latest international news and world events from around the world.
A Stubborn Question Answered: New Research Reveals How the Milky Way’s Disk Formed
Figuring out how the Milky Way’s thin and thick disks formed is a tough question in astronomy. It relies on determining individual stellar ages accurately. Gaia was pretty good at that, and new research based on its data may have found the answer.
Using thousands of AI agents to uncover new leads in biological data
AI agents just uncovered promising new leads for neurodegenerative disease research—in just 32 minutes.
Here’s what thousands of GPT-Rosalind agents accomplished by working in parallel:
- Analyzed millions of mouse brain cells — Connected gene disruptions to findings in scientific literature — Identified unexpected biological mechanisms — Uncovered a potential link between cholesterol metabolism and neurodegeneration.
Research that could take human scientists months—or even a year—to carry out was completed in roughly half an hour.
The bigger story isn’t just speed. It’s how AI agents could help researchers uncover biological connections that might otherwise take far longer to find.
These are promising research leads, not yet confirmed discoveries—but they point to an exciting new role for AI in scientific discovery.
M2 receptors are required for spatiotemporal sequence learning in mouse primary visual cortex
Acetylcholine is a neurotransmitter that plays a variety of roles in the central nervous system. It was previously shown that blocking muscarinic receptors with a nonselective antagonist prevents a form of experience-dependent plasticity termed “spatiotemporal sequence learning” in the mouse primary visual cortex (V1). Muscarinic signaling is a complex process involving the combined activities of five different G protein-coupled receptors, M1–M5, all of which are expressed in the murine brain but differ from each other functionally and in anatomical localization. Here we present electrophysiological evidence that M2, but not M1, receptors are required for spatiotemporal sequence learning in mouse V1. We show in male mice that M2 is highly expressed in the neuropil in V1, especially in thalamorecipient layer 4, and colocalizes with the soma in a subset of somatostatin-expressing neurons in deep layers. We also show that expression of M2 receptors is higher in the monocular region of V1 than it is in the binocular region but that the amount of experience-dependent sequence potentiation is similar in both regions and that blocking muscarinic signaling after visual stimulation does not prevent plasticity. This work establishes a new functional role for M2-type receptors in processing temporal information and demonstrates that monocular circuits are modified by experience in a manner similar to binocular circuits. NEW & NOTEWORTHY Muscarinic acetylcholine receptors are required for multiple forms of plasticity in the brain and support perceptual functions, but the precise role of the five subtypes (M1–M5) are unclear. Here we show that the M2 receptor is specifically required to encode experience-dependent representations of spatiotemporal relationships in both monocular and binocular regions of mouse V1. This work identifies a novel functional role for M2 receptors in coding temporal information into cortical circuits.
New Gene-Editing Method, ‘Prime Assembly,’ Corrects Multiple Mutations at Once
Approach builds on prime editing, advances journey toward universal gene therapies
White House S&T Strategy Reframes National Security Tech
Chuck Brooks is the president of Brooks Consulting International and one of Executive Mosaic’s GovCon Experts.
The White House’s strategy prioritizes science and technology for national security. US success will depend on its ability to translate advances in AI, quantum computing, biotechnology, space and other critical fields into resilient, deployable capabilities faster than its competitors.
An aging-sensitive secreted phospholipase confers neuroprotection and cognitive resilience
This study identifies a secreted phospholipase in the hippocampal dentate gyrus that mediates an aging-sensitive compensatory mechanism promoting cognitive resilience and neuroprotection.
Spinal ependymoma: a comprehensive review of molecular classification, management guidelines, and clinical outcomes with a focus on the pediatric population (Part III of ependymomas across compartments) — Journal of Neuro-Oncology
Spinal ependymomas are rare tumors of the central nervous system characterized by distinct anatomical, histological, and molecular subtypes. This review aims to synthesize current evidence regarding the presentation, diagnosis, surgical management, adjuvant therapy, and outcomes of spinal ependymomas, with a focus on the pediatric population.
We conducted a narrative review of contemporary literature, consensus recommendations, and relevant treatment-related molecular classifications. Key topics included preoperative evaluation, neuraxis imaging, intraoperative strategies, extent of resection, histopathologic and molecular risk stratification, adjuvant radiotherapy and chemotherapy, recurrence patterns, and long-term surveillance. Representative clinical cases illustrating the surgical management of intramedullary spinal ependymomas and myxopapillary ependymomas are provided in the supplementary material.
Spinal ependymomas encompass spinal ependymoma, spinal ependymoma with MYCN amplification, spinal subependymoma, and spinal myxopapillary ependymoma. The primary therapeutic goal is maximal safe gross total resection, which is the most consistent modifiable predictor of progression-free survival. Molecular classification enhances risk stratification, especially for the aggressive MYCN-amplified subgroup. However, histologic grade and the extent of resection remain critical to management. Adjuvant radiotherapy is generally recommended for cases involving subtotal resection, grade 3 disease, tumor dissemination, capsular violation in myxopapillary tumors, or high-risk biology. Chemotherapy does not have a well-established role as a first-line treatment. Much of this evidence is extrapolated from adult or mixed-age cohorts, however, and pediatric-specific data remain limited across nearly every management domain, a gap we characterize systematically.
Motor neurons activate unexpected defense to clear ALS-linked protein before it clumps
ALS is a disease in which, in most cases, a protein forms aggregates in neurons, leading to the rapid loss of motor control and death. A Nagoya University research team has discovered in human neuron cell cultures and mice an unexpected defense mechanism that neurons switch on to avoid these aggregates, offering a new potential path to developing a treatment.
Amyotrophic lateral sclerosis (ALS) is a neurodegenerative disorder that affects roughly 10,000 people in Japan. It is characterized by a rapid loss of control over the limbs and other body parts. Without a ventilator, patients have a life expectancy of two to five years after onset.
In most cases, a specific protein is at the root of the problem: TDP-43 is usually in the neuron’s nucleus and has various roles in maintaining the cell’s health and function. However, in people with ALS, it aggregates in the cells’ cytoplasm.
Helping others linked to younger-looking adult brains, even after accounting for health and lifestyle
Population surveys and research studies suggest that meaningful social connections are strong predictors of health and longevity. In other words, a sense of belonging to a social group and strong social bonds appear to be linked with better health and a longer lifespan.
Most earlier studies, however, primarily focused on the possible health-related benefits of receiving social support or interacting with others regularly. In contrast, the potential benefits of supporting and helping others remain largely unexplored.
Researchers at Georgetown University, Emory University and the University of Wisconsin–Madison recently carried out a study investigating the possibility that time spent supporting others is associated with brain health. Their findings, published in Translational Psychiatry, suggest that the brains of people who report spending more time supporting others appear younger (relative to their actual age) than those of people who report spending less time helping others.